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7 months ago

Petromin marine and offshore Jan-Feb Issue

ation of alternative

ation of alternative propulsion concepts, availability, reliability and maintenance studies, conceptual design and specification of optimized propulsion systems, shock, noise and vibration studies and integration of the power and propulsion and distribution systems components with each other and other interfaces in the vessels. As one of the early pioneers in podded electric propulsion units GE offer solutions that emphasize hydrodynamic performance and incorporate the latest variable speed drive and motor technology. GE designs ensure reliability, robustness, system compactness, and low levels of noise and vibration, as well as high manoeuvrability and overall system efficiency. Wärtsilä Low Loss Concept (LLC) LLC is an energy efficient and highly redundant power distribution system for electric propulsion applications. The Low Loss Concept (LLC) is a power distribution system comprising higher efficiency, lower weight and volume, and a high system redundancy. The basic motive for the design is to reduce and eliminate the need for supply (pulse) transformers to the frequency converters, especially those supplying electric propulsion. LLC is available for both Low Voltage and Medium Voltage applications. It covers all power applications between 48 January to February 2018

efrences 5MW and 45MW in both the Low Voltage and Medium Voltage versions. It is effective also in vessels with operating profiles that require variable speeds, such as OSVs. brighthubengineering.com GE Wärtsilä The LLC power distribution system has been patented internationally by the Wärtsilä Group. Wikipedia Wärtsilä Low Loss Hybrid (LLH) The introduction of Wärtsilä Low Loss Hybrid (LLH) and its integration with a conventional diesel or dual-fuel engine generating sets, offers significant efficiency improvement by running the engines on optimal load and absorbing many of the load fluctuations through batteries. The system is designed and integrated to optimise the overall operation of the vessel. The power and energy capacity of the battery should be suitable to allow the engine to run for most of the time on optimal loads. The system is designed and integrated to optimise the overall operation of the vessel. A key element is hybrid control algorithms for load sharing between units and efficient power and energy management. January to February 2018 49

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